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准噶尔沙蒿群落主要物种间的关联性分析/Interspecific Associations among Main Species in Artemisia songarica Communities in Junggar Basin, China[J]
Authors
中国科学院新疆生态与地理研究所干旱区生物地理与生物资源重点实验室,新疆乌鲁木齐,830011
中国科学院新疆生态与地理研究所干旱区生物地理与生物资源重点实验室,新疆乌鲁木齐830011/中国科学院研究生院,北京100049
张元明
陶冶
Publication date
1 January 2012
Publisher
Abstract
采用方差比率法(VR),基于2×2列联表的Y。统计量、Ochiai联结指数(oj)以及去势对应分析(DCA),对准噶尔荒漠地区15个准噶尔沙蒿(Artemisiasongarica)群落21个主要物种间的关联性进行了分析。结果表明:准噶尔沙蒿群落物种间总体为显著正关联(VR=2.726〉1)。210个种对中,正关联种对数(125对)多于负关联种对(85),且前者达到显著关联的种对数(53)也多于后者(4)。准噶尔沙蒿与伴生种间虽为显著正关联,但OI联结指数稍小。群落内多数伴生种间的关联性较弱(0I〈0.4),表明物种多趋于独立和随机分布。群落优势种琉苞菊、角果藜、囊果苔草、尖喙栊牛儿苗、齿稃草和条叶庭荠之间为显著正关联,且OI指数最大,表明这些物种具有相似的生态需求。DCA排序图中的种间距离和分布位置较好地表征了物种之间的相互关系,印证了上述结论。总之,准噶尔沙蒿群落虽生境不同,但群落内种间关系总体上较稳定,这对准噶尔沙蒿种群分布和群落发展较有利
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Institutional Repository of Xinjiang Institute of Ecology and Geography, CAS
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Last time updated on 29/11/2016